var mycircle = {
    circumference:function(){
        var r = process.argv[2];
        var cir = 2*3.14*r;
        console.log(cir); 
    },
    area:function(){
        var r = process.argv[2];
        var are = 3.14*r*r;
        console.log(are); 
    }
}
module.exports = mycircle;